Since Responsive Design is the actual trend, and most of the free frameworks have compatibility issues with Telerik Controls due to the Global Styles, I suggest a new Responsive Framework. A Telerik Responsive Framework, that out of the box would work perfectly with all the Telerik suite. I believe that this would be very appreciated by all your customers. Some of the controls should also be prepared to work with this framework resizing it's elements according to the device.

Some colors (for example #ccffff, #ccccff, #e5f2ff, #eef9fc, #003366, #006400) are not properly  applied in the Colorize tab of the Visual Style Builder and choosing one of them results in setting a different color.

Currently Telerik RadGrid does not support a GridCalculatedColumn inside a GridTemplateColumn. GridCalculated Column is a veru useful feature and should be available inside a Template column as well.

Thanks

I see a lot of forum chatter, blog and code library pieces, for years now, about DblClick.
Like in the RadGrid, TreeView, TreeList, Combo, DropDownList, DropDownTree, etc. 
Why not implement this standard in the controls; ItemDblClick, RowDblClick server side in Grid for ie.

I am using Header Context Filter Menu for the RadGrid.I found the two different filter options with that but there is an "And" option where "Or" option makes more sense to use with compare to "And".Even I did not finding any option on RadGrid to change this "And" option to "Or". Waiting for you kind response if you have any work arround or fix for this as i am in b/w of the development and found this. So let me know as early as possible.

MaskedTextBoxSetting set with numbers in the mask does not allow numbers to be entered from the number pad area of the keyboard.

I have a Rad Grid with modal popup option for insert and update operation. When i insert or update some record for this rad grid the modal pop up doesn't close by clicking on save button in Internet Explorer 10 and hence the record is not saved. It works fine with previous versions of Internet Explorer and also with other browsers like Chrome and Firefox. Find the attachment for a related snapshot.

An ArgumentOutOfRange exception is thrown when using a horizontal barchart with AutoLayout = true.

[ArgumentOutOfRangeException: Length cannot be less than zero.
Parameter name: length]
   System.String.InternalSubStringWithChecks(Int32 startIndex, Int32 length, Boolean fAlwaysCopy) +10695301
   System.String.Substring(Int32 startIndex, Int32 length) +10
   Telerik.Charting.TextBlock.get_VisibleText() +194

When the control is modal it should create a second iframe behind the modal background like it creates one behind the popup itself. This will allow the modal background to stay above heavy-weight objects in IE as well.

The control will provide the ability to hover over an image and zoom-in the selected part in a previewer. Such control is available in Google Maps as shown in the attached screenshot Overview-Image-Map-Control.png. Yet another example is displayed in the second screenshot.

You can comment and share your examples or features you would like this control to support.

Examples:

http://demos.telerik.com/silverlight/#Treemap/AbsoluteValueBrushColorizer

Add your own example or features you would like a treemap control to have by commenting below.

When large zip files with a lot of files inside is uploaded, the httphandler throws an System.OverflowException "Value was either too large or too small for an Int32." This only happens in HTML 5 File API mode.

The sprite images for the RadButton are moved from the "Button" folder to the "Common" folder of the skins, but the Visual Style Builder searches the images in the Button folder.

The workaround is to extract the archive generated by the Visual Style Builder, move the sprites from the Common folder to the Button folder, archive the files again and import them in the Visual Style Builder. This allows you to edit them in the tool and after that you can download the skin and move the sprites back to the Common folder.

My ASP.NET project updated 2013 Q1.

Not bad. but I found some error.

RadGrid's clientSettings element of AllowScroll = 'true' if the layout is broken.

The reason for the scroll function will render the data area is divided into a new DIV.

HEADER column portion and a data portion, while the size of the column is divided 

into different DIV does not fit.

Attach the file. Look the screenshot.

When i copy paste bulleted conted from MS word 2010 in Rad editor, it appends extra style margin in the last line and shifts the content towards the right. I  used StripFormattingOptions= "MSWord" and StripFormattingOptions= "None SuppressCleanMessage" but none of these options are helping.
I also disabled all the filters. Please let me know how i can retain my bulleted formattings while i copy paste from MS word 2010.Attaching the screenshots